Huawei NetCol500-A080 - Exhausting Nitrogen at the Outdoor Unit Needle Valves; Welding the Outdoor Unit Ports

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Exhausting
Nitrogen at the Outdoor Unit Needle Valves
6.6
Do not remove the needle valve plugs in case of loss or damage.
Water-Cooled Module
NetCol500-A060/A080/A120
NetCol500-A110
Thermal insulation foam
5/8 inch liquid pipe
7/8 inch gas pipe
5/8 inch liquid pipe
Thermal
insulation
foam
7/8 inch gas pipe
Welding the Outdoor Unit Ports
6.7